White noise basics
White noise: frequently asked questions
Short, direct answers. Follow the links for detail.
This page answers 25 common white noise questions, from what white noise is and whether it is safe for babies to how loud it should be and whether it helps with sleep, ADHD or tinnitus.
Questions are grouped below. Each answer links to a full guide.
Basics
See the questions below, and the guides on what white noise is, the colors of noise and how it works.
Frequently asked questions
What is white noise?
A steady hiss with equal power at all pitches, like static. See what is white noise.
Is white noise the same as pink or brown noise?
No. They have more low-pitched energy. See the comparison.
How does white noise work?
Mainly by masking other sounds. See how white noise works.
Is white noise safe for babies?
At low volume, played from across the room, for most families. See white noise safety.
How loud should white noise be for a baby?
About 50 decibels or lower at the crib. See the volume guide.
How far away should white noise be from a baby?
As far as the room allows, ideally across the room, about two meters or more.
Can white noise play all night for a baby?
Yes, if it is quiet and distant. A timer is another option. See all night.
Does white noise help babies sleep?
It helps many, but evidence is limited. See the research.
Why does white noise calm babies?
It resembles womb sound and covers startling noises. See why.
Which sound is best for a newborn?
Womb, heartbeat and brown noise are common first choices. See by age.
Can white noise hurt a baby's hearing?
Loud sound for long periods can. Keep it quiet and far. See safety.
Should I put the sound machine in the crib?
No. Keep it across the room, out of reach.
Can white noise cause dependence?
Babies can come to expect it. Most outgrow it. See weaning.
Does white noise help with colic?
It does not treat colic but may soothe crying. See colic.
Is a phone app as good as a sound machine?
For most families, yes. See app vs machine.
Does white noise help adults sleep?
For some. Research is mixed. See adult sleep.
Does white noise help with studying?
It can reduce distraction for some people. See studying.
Does white noise help ADHD?
Some small studies suggest so. See ADHD.
Does white noise help tinnitus?
It can make tinnitus less noticeable. See tinnitus.
Is brown noise better than white noise?
It is deeper and softer. See brown noise.
What is pink noise?
A softer steady sound, like rain. See pink noise.
Is there a free white noise generator?
Yes. Use the free generator.
Does the Baby White Noise app work offline?
Yes, all 20 sounds are stored in the app.
Is Baby White Noise free?
Yes. There is one optional one-time upgrade and no subscription.
Which languages does the app support?
English, Spanish, Portuguese, French, German, Hebrew, Turkish, Russian and Arabic.
This page is general information, not medical advice. Talk to your pediatrician about your baby's sleep and hearing, and follow current safe sleep guidance.